Bin-gate.



PATENTE'D 001. 17, 1905.

J. LAWSON.

BIN GATE.

APPLICATION HLBD OOT.18,1904.

mane-v. nv ommm cov vuorc-umcanmxsks. wasmuarom a. c.

JOHN LAWSON, OF COPPER CLIFF, CANADA.

Specification of Letters l-atent.

Patented Oct. 17, 1905.

Application filed October 18, 190A- Serial No. 228,989.

To all who/rt it may concern:

Be it known that 1, JOHN Lawson, mine superintendent, of the town ofCopper Cliff, in the District of Nipissing, in the Province of Ontario,Canada. have invented certain new and useful Improvements in Bin-Gates;and I do hereby declare that the following is a full, clear, and exactdescription of the same.

My invention relates to improvements in gates for releasing materialfrom overhead bins, in which the gate proper is a segment of a cylinderand is rotated by suitable gear ing in contact with the curved edges ofthe sides of the hopper. T attain these objects by the mechanismillustrated in the accompanying drawings, .in which- Figure 1 is an endView showing the arrangement of the rotating gear. Fig. 2 is an end viewof the gate and hopper. Fig. 3 is a side view of the whole mechanismwith timher a removed.

Similar letters refer to similar parts through out the several views.

The wrought crank a is attached to the shaft 5 of the cast pinion 0,which is mounted in the cast bearing (Z. This in turn is bolted to thesupporting-timber 2. The pinion c engages with the cast segmental gearf,which is keyed onto the main shaft of the gate and held in position bythe set-screw l1. This shaft is mounted in cast boxes )1 which arebolted with the filler-blocks 7; it It to the timbers Z t Z, which formpart of the bottom frame of the bin. The shaft 1 is held in positionlongitudinally by the collars m m, fastened with setscrews. The gate atis of wrought plate bent to a segment of a cylinder, with the concaveside inward toward the hopper. The hopper is cast and of three pieces,the vertical sides 0 0 and the sloping back 39. The vertical sides 0 0have one edge forming an arc of slightly smaller radius than the insideof the gate-plate '12,. The tops have horizontal flanges q 1, turningoutward and supporting the hopper on the timbers Z J. On the remainingedges are flanges r r, turning inward and to which the inclined back ofthe hopper is bolted on the inside. The back 1) has stiffening-ribs s.s' s and a flange 25, which rests on the supportingtimber a, whichextends transversely to the timbers Z Z. The gate a is riveted along oneedge to the shaft g (which is bent Lil-shaped to pass around it) and issupported along the other edge by a strap 1), which passes up outsidethe vertical side 0 0 and is riveted to the shaft close to the bend. Thegate wand the edges of the vertical sides 0 0 are arrangedconcentrically with the shaft (7.

The full lines in Fig. 2 show the gate 0 in position closed with theedge just outside the lower edge of the inclined floor on of the bin.The dotted lines show the gate partially open, allowing the material tofall through from the hopper.

in operation the crank (I, is revolved in either direction-to the rightto close, to the left to open--and the gate n travels along the edges ofthe vertical sides 0 0, preserving a uniform clearance thrmiglnmt itsmotion.

On account of its construction the shaft g forms no obstruction to thefree passage of material through the hopper, and the gate can be easilyand completely closed without any possibility of jamming, owing to theconcave surface being next to the material in the hopper and the lastpart of the gate travel at the closing edge being nearly vertical and atthe extreme edge of the line of flow of the material.

am aware that prior to my invention bingates have been made with curvedplates. Therefore I do not claim such a combination broadly; but

i Vhat I do claim as my invention, and clesire to secure by LettersPatent, is

1. A biirgate having in combination with the gate, a til-shaped crankattached to the gate; substantially as described.

2. A bin-gate having in combination with the gate, a til-shaped crankattached to the gate, and a strap also connecting the gate with thecrank-shaft; substantially as described.

3. T he combination of the three pieces, viz. the tJ-shaped shaft, g,the ill-shaped strap, o, and the bent plate, a, forming a gate.

a. The combination of the cast vertical sides 0, 0, o, and of the back,7), with each other, and with the timbers Z, l I, '21:, to form ahopper, substantially as shown and described.

in testimony whereof I have signed my name to this speei lication in thepresence of two subscribing witnesses.

JOHN LAiVSON. Witnesses:

Tues. StrojoDAirr, (ii-no. R. CRAIG.

